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Description
Focusrite ISA428 MKII Classic ISA 4-Channel Mic PreNow in its second generation, the ISA 428 Mk II incorporates four of Focusrite's renowned mic pres in a simple to operate 2U enclosure, placing four mic preamps, instrument inputs and line ins at your fingertips. The original Focusrite mic pre was designed to suit the microphones of the time; today's model makes one small change, adding three additional input impedances to the classic ISA110 setting, allowing you to match any microphone, old or new,
Now in its second generation, the ISA 428 Mk II incorporates four of Focusrite's renowned mic pres in a simple-to-operate 2U enclosure, placing four mic preamps, instrument inputs and line ins at your fingertips.
The original Focusrite mic pre was designed to suit the microphones of the time; today's model makes one small change, adding three additional input impedances to the classic ISA110 setting, allowing you to match any microphone, old or new, and access a wide range of sounds, from the character and warmth of a vintage mic to the clear transparency of a modern design. Or you can experiment and bring out just the qualities you want.
In addition to the mic inputs, there are four front-panel instrument inputs making the ISA428 Mk II ideal for overdubs in the control room with no need for a DI box. On the back: four line inputs and switchable insert points on each channel to allow routing via external signal processors. There's also a versatile, vintage design variable high-pass filter to control what's going on at the bass end.
And finally... accurate, 6-LED meters to tell you exactly what's going down. Optionally available for the ISA428 Mk II is a precision eight-channel A-D converter with 122dB dynamic range and superb jitter performance — ideal for simple interfacing with your DAW (sold separately).
Features
- Four ISA series transformer-based preamps — ISA series mic preamps have been the producers' choice on countless hit records over the last two decades.
- Eight-channel optional A-D converter — Four additional A-D converter inputs allow eight channels of high quality conversion, with a dynamic range of 122dB and jitter performance below 250 picoseconds.
- Selectable impedance — Ideal for mic matching or extended microphone creativity. Settings include the 'Vintage ISA110' setting, providing the original focusrite signature sound.
- Four front panel instrument inputs — Instant access on the face of the unit - no separate DI box required.
- Dedicated analogue insert points — Switchable insert points are featured on every channel, allowing routing (between preamp and output) through additional external processing.
- Accurate LED meters for every channel — Clear metering designed to catch even the fastest and most elusive of transients.
Specifications
Mic inputs
- Frequency Response At Minimum Gain (0dB) (Mic)-0.35dB at 20Hz and –3dB at 122kHz
- Frequency Response At Maximum Gain (60dB) (Mic)–2.5dB at 20Hz and –3dB 103kHz
- Gain Range (Mic)0dB to 60dB in 10dB steps, plus 0dB to 20dB continuously variable trim
- Maximum Headroom (Mic)7.4dBu
- Noise EIN (Mic)-126dB (measured at 60dB of gain with 150O termination and 20Hz/22kHz bandpass filter)
- Noise At Main Output With Unity Gain (Mic)-98dBu (measured with a 20Hz/22kHz bandpass filter)
- SNR (Mic)123dB (relative to max output 25dBu) 120dB (relative to 0dBFS ( 22dBu)
- CMRR (Mic)88dB
- Input Impedance, Variable (Mic)600O, 1400O, 2400O, 6800O
Line inputs
- Frequency Response At Unity Gain (0dB) (Line)-0.3dB at 20Hz and –3dB at 94kHz
- Gain Range (Line)-20dB to 10dB in 10dB steps, plus 0dB to 20dB continuously variable trim
- Maximum Headroom (Line)25.4dBu
- THD N (Line)0.002 (measured with 4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter)
- Noise At Main Output With Unity Gain (Line)-91dBu (measured with a 20Hz/22kHz bandpass filter)
- SNR (Line)116dB (relative to max output 25dBu) 113dB (relative to 0dBFS 22dBu). Input Impedance: 10kO
- Frequency Response At 10dB Gain (Instrument)-0.2dB at 20Hz and 0dB at 200kHz
- Frequency Response At 40dB Gain (Instrument)-3dB at 20Hz and –3dB at 38.4kHz
Instrument inputs
- Gain Range (Instrument)10dB to 40dB continuously variable
- Maximum Headroom (Instrument)11.5dBu
- Noise At Main Output With Minimum Gain ( 10dB) (Instrument)-95dBu (measured with a 20Hz/22kHz bandpass filter)
- Input Impedance (Instrument)>1MO
High-pass filter
- Roll Off18dB per octave 3 pole filter
- Frequency Range16Hz to 420Hz (continuously variable, measured at the 3dB down point)
Front and rear connectivity
- Analogue Audio Outputs (Outputs 1-4)4 line XLR outputs on rear panel, 4 insert send 1/4” TRS jacks on rear panel
- Other I/OIEC power input connector 100Vac – 240Vac
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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